/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: AliceMana
 * Date: 2023-01-01
 * Time: 16:17
 */

// 使用两个线程来累加 count 的值
    // 每个线程循环 1w 次，累加变量 count 的值，count 默认值为 0，注意线程安全问题。
public class Test2 {
    public static void main(String[] args) {
        Counter counter = new Counter();

        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 10000; i++) {
                counter.addCount();
            }
        });
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 10000; i++) {
                counter.addCount();
            }
        });

        t1.start();
        t2.start();

        try {
            t1.join();
            t2.join();
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }

        System.out.println("result= " + counter.count);
    }

}

class Counter {
    public int count;

    public void addCount() {
        synchronized (this) {
            count++;
        }
    }
}
